In fact, the specific information was completely destroyed when the 73 1 troops withdrew. So we only know a little. The main experiments can be divided into three categories. The first is the experiment of human body structure, which is to dissect and understand human body function. The second category is therapeutic experiments, such as clinical trials of special therapeutic drugs such as frostbite. This is used by Japanese soldiers when they are injured. The third category is virus experiment. How to experiment specifically? The Japanese have destroyed all the data. We can only know through some rumors. So it's true if it can't be verified.